ARRMA 1/5 KRATON 30/9T Front & Rear Differential Upgrade - MAKX0930S/2 by GPM  [MAKX0930S/2]

Front and rear assembled diffs for ARRMA 1/5 KRATON

This MAKX0930S/2 aftermarket assembly is a drop-in style front and rear differential set made specifically for ARRMA 1/5 8S platforms. Each diff is supplied fully assembled and combines 20CrInTiH hardened steel gears with 7075 alloy housings to offer a robust yet manageable weight solution for large-scale off-road trucks.

The helical 30T/9T gear pairs use a 2.0mm module, which helps distribute mesh loads better than straight-cut teeth while keeping backlash and noise predictable for setup. Units are shipped without differential oil, so fill the diffs with the silicone oil viscosity that suits your handling; 100k cSt is recommended for a high locking effect under heavy torque.

Fitment mirrors ARRMA's factory layout and this assembly replaces OEM part number ARA310937. It is intended purely for RC applications where greater torque resistance and improved gear engagement are required, such as aggressive off-road and stunt use on ARRMA 1/5 platforms.

The package includes both front and rear assembled differentials in the 30/9T ratio, ready for installation after adding your preferred differential oil.

This kit is suited to ARRMA 1/5 owners seeking stronger, repeatable diff behavior under heavy loads; finalise oil choice to tune lock and handling before fitting.